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Title: Method and apparatus for monitoring the power of a laser beam

A method for monitoring the power of a laser beam in real time is disclosed. At least one optical fiber is placed through the laser beam, where a portion of light from the laser beam is coupled into the optical fiber. The optical fiber may be maintained in a stationary position or moved periodically over a cross section of the laser beam to couple light from each area traversed. Light reaching both fiber ends is monitored according to frequency and processed to determine the power of the laser beam.
 [1];  [2]
  1. (San Ramon, CA)
  2. (Livermore, CA)
Issue Date:
OSTI Identifier:
United States of Americas as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5490157
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
method; apparatus; monitoring; power; laser; beam; time; disclosed; optical; fiber; placed; portion; light; coupled; maintained; stationary; position; moved; periodically; section; couple; traversed; reaching; monitored; according; frequency; processed; determine; stationary position; laser beam; optical fiber; couple light; light reaching; /372/